Lock



p 3-1-- c. c. CARTIA LOCK 2 Sheets-Sheet l Filed June 21, 1929 BY W ATTORNEYJ Sept. 8, 1931. c, c, -11 1,822,611

LOCK

Filed June 21, 1929 2 Sheets-Shout 2 INVENTOR.

A TTORNEYXS Patented Sept. 8, 1931 PATENT OFFICE CHARLES C. CARTIA, OF MCKEESPOR'I, PENNSYLVANIA LOCK Application filed June 21,

This invention relates to certain new and useful improvements in locks.

The primary object of the invention is to provide a lock for doors, trunks, boxes or any structure comprising a hinged closure and has for its primary object to provide a lock construction requiring the use'of a single key for moving a lock bolt into locking position and requiring the use of a plurality of keys for releasing the lock bolt or moving the latter to its released position.

A further object of the invention is to provide a lock of the above type wherein a single key is employed for shiftingthe lock bolt 1; into locking position and a plurality of keys are provided for releasing the lock bolt to permit the locking key to move the bolt to releasing position signal devices, both audible and visual being associated with the look bolt releasing means to signal the fact that the lock mechanism is being operated.

Vith the above and other objects in View that will become apparent as the nature of the invention is better understood, the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

Figure 1 is a fragmentary elevational' view of one embodiment of the invention showing the lock associated with a hinged door and illustrating the visual and audible signal mechanism associated with the lock mechanism;

Figure 2 is a diagrammatic-view of the wiring arrangement for the audible and visual signal mechanism;

Figure 3 is a fragmentary rear elevational view with part of the lock casing removed showing the releasing members for the lockin g bolt;

Figure 4 is a fragmentary front elevational view showing the face plate of the look at the outer side of the door;

Fi ure 5 is a fra ment'ar elevational view b a y casing 12set lntOil recess 13 at the inner side with a wall of the lock casing removed to show the sliding lock bolt;

Figure 6 is a vertical cross-sectional view taken on line 66 of Figure 3 showing the key operated lever for one of the signal de- 5 vices and bolt releasing members;

1929. Serial No. 372,715.

Figure 7 is a vertical cross-sectional view taken on line 7-7 of Figure 3 showing one key construction for operating the sliding lock bolt;

Figure 8 is a perspective view of the key block;

Figure 9 is a side elevational view of a grapple member for removing the key block from the spindle of the member for shifting the lock bolt to permit use of the key shown in Figure 8;

Figure 10 is a side elevational View, partly in section of another key for operating the sliding lock bolt;

Figure 11 is aside elevational view partly in section of a key for operating the lockbolt releasing and signal operating levers; and

Figure 12 is a fragmentary elevational view showing an increased member of lock bolt releasing levers requiring a larger number of keys for releasing the same.

For purposes of illustration, the lock is shown as associated with a door 1 set into the wall 2, the lock generally designated by the reference numeral 3 including a sliding lock bolt to be later described in detail with means for releasing the bolt when in its locked position to permit retraction of the bolt by an operating key, the bolt releasing means operating electric switches in an electric circuit that includes a visual signal 4 and an audible signal 5. The wiring arrangement as shown in Figure 2 comprises lead in wires'6 from a source of energy, continuing as at 7 with the lamp tset therein that is controlled by the switch 8. A transformer 9 in the wiring section 7 has outlet wires 10 leading to the bell the operation of which is controlled by the switch 11. The wiring arrangement and switches 8 and 11 for the lamp 4 and bell 5 respectively will be later described in conneotion with the lock mechanism.

The lock mechanism includes a rectangular of the door 1, the casing havinga removable cover Wall 14 and an interior partitionwall 15 extending longitudinally and providing a separate compartment for the sliding lock bolt 16, the compartment for the sliding lock bolt being closed at the other side by the casing plate 17.

A shaft or arbor 18 extends transversely of the casing through the compartment housing the sliding lock bolt 16 and above the lat ter, the shaft 18 being journaled in the com partment wall 15 and plate 17 with the forward end 19 thereof being of polygonal formation in cross-section and extending into a key receiving opening 20 formed in the door 1. The shaft 18 within the lock bolt compartment has a. star wheel formed integral therewith as shown in Figures 5 and 7, the legs 21 of which cooperate with a lug 22 and recessed walls 23 formed in the upper side of the lock bolt 16, the lock bolt being centrally recessed as at 24 with the lug .22 rising therefrom to be engaged by the legs 21 of the star wheel for shifting the lock bolt. 1

The lo ck bolt 16 may be shifted to its locked position by having the nose 160s thereof projected into the keeper 8a shown in Figure 1 by ope 'ating the knob 25 indicated by dotted lines in Figure 7 that is engaged with the inner key and 18a of the shaft 18, while the bolt 16 may also be shifted into locked position at the outer side of the door by key devices shown in Figures 7 to 10. The keyblock 26 rectangular in cross-section and slightly tapered as shown in Figure 8 has a rectangular bore 27 therein to be received on the key end 19 of the shaft 18. The key 28 having a socketed head is projected into the door opening 20 engaged ith the key block 26 for operating the bolt 16. It is intended that the key block be carried in the pocket as an accessory to operating the lock mechanism, but should this key block become lost, the key 29 shown in Figure 10 may be employed, the socketed end 29% thereof being of dimensions similar to the key end 19 ofthe shaft 18. In the event that the key 28 hecomes lost, the grapple shown in Figure 9 comprising a U-shapcd wire member having side legs 30 and hookedends '31 is engaged with the key block26, the hooked ends 31 being moved through the side slots '32 in the key block and entering the openings 33 for interlocking engagement with the key block to facilitate removal thereof from the shaft end 19. Either of the keys 28 or 29 may be employed for shifting the lock bolt 16 into projected locked position and when the bolt as been so shifted, the same is retained against retracting movement by devices engaged therewith requiring the employment of additional key members for rendering such devices inoperative and permitting either key 28 or 29 to retract the bolt.

The devices for holding the bolt in its locked projected position includes, as shown in Figures 3 to 7, a pair of lever plates 34 and 35 confined in the lock casing and each being pivotally mounted as at 36. The lever plates 34 are disposed adjacent the lock wa'lll M of the lock casin g and each lever plate carries at its lower end a forwardly projecting pin 37 to be extended into an opening 38 aligned therewith and formed in the lock bolt 16 when in projected position. fhe upper end of each lever plate is associated with one of the switches 8'01 11 of the signal mechanism so that when operated to disengage the pin 37 from the bolt, the switch is operated, as indicated in Figure 6 for sounding an alarm, one lever plate being associated with the switch 8 and the other lever plate being associated with the switch 11 and as both lever plates are required to be operated to disengage the pins 37 from the lock bolt 16, both visual and audible alarms are given when the lock bolt is to be operated. lhe operating means for the lever plate includes an internally threaded tubular member 39 secured as at L0 to each lever plate above the pivotal mounting 36 and slidably extends forwardly through the sliding bolt compartment and into an opening ll formed in the door 1. A screw key is adapted to be engaged with each internally threaded tubular member 39 for operating the lever plate 34 and as shown in detail in Figure 11 comprises a threaded stem 42 having a handle 13 upon one end and a blade arm 4% hinged thereto as at one end and normally occupying a position in a side slot in the stem 42. The key stem is inserted through the opening ll and threaded into the tubular member 39 and when the blade arm 4% is moved outwardly of the stem slot as shown in Figure 6, the same is engaged with the face plate upon the door and continued threaded movement of the key stem into the tulmlar member causes pivotal movement of the lever plate to disengage the retaining pin 37 from the lock bolt 16 and to move the upper end ofthe lever plate into position for operating the electric switch. It will therefore be understood that when the lock bolt 16 is in its retracted position, the pins 37 upon the lever plates 34 are out of alignment with the openings 38 in the lock bolt and that the lockbolt may be shifted into locked position with the use of a single key as previously described. To release the lock bolt-,it is necessary first to disengage the pins 37 therefrom and at which time operation of the shaft 18 and star wheel carried thereby engages the lock boltto retract the same and during pivotal movement of the lever plates 3%,both switches 8 and 11 are operated for giving visual and audible signals that someone is operating the door locking mechanism. Figures 3 to 7 illustrate the invention com prising two lever plates having retaining pins for the lock bolt which require three keys for releasing the lock bolt, while as illustrated in Figure 12, four lever plates are employed requiring the use of five keys for releasing the lock bolt and it is to be understood that any number of bolt retaining lever plates may be employed.

From the above detailed description of the invention, it is believed that the construction and operation thereof will at once be apparent, and while there are herein shown and described the preferred embodiments of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

I claim 1. A look comprising a casing, a sliding lock bolt therein, key operated means for shifting the bolt to locked position, levers pivoted in the casing, each having a pin moving into interlocking engagement with the bolt when projected to locked position, means for moving the levers to separate the pins from the bolt whereby the key operated means may be employed for releasing the bolt, the key operated means including a shaft extending transversely of the casing and engageable with the bolt with an end projecting from the casing and a block keyed on the end of the shaft adapted for the engagement of operating means therewith.

2. A look comprising a casing, a sliding lock bolt therein, key operated means for shifting the bolt to locked position, levers pivoted in the casing, each having a pin moving into interlockingengagement with thebolt when projected to locked position, means for moving the levers to separate the pins from the bolt whereby the key operated means may be employed for releasing the bolt, the key operated means including a shaft extending transversely of the casing, a block keyed on the end of the shaft, the block having side grooves and transverse openings adjacent one end for the application of arwire puller having hooked ends passed through the grooves to enter the openings for removing the block from the shaft end.

3. A look comprising a casing, a sliding lock bolt therein, key operated means for shifting the bolt to locked position, levers pivoted in the casing, each having a pin moving into interlocking engagement with the bolt when projected to locked position, means for moving the levers to separate the pins from the bolt whereby the key operated means may be employed for releasing the bolt, the key operated means including a shaft extending transversely of the casing and engageable with the bolt with an end projecting from the casing, a block keyed on the end of the shaft for the engagement of operating means therewith, the lever means including a tubular member provided with means for moving said tubular member.

In testimony whereof I affix my signature.

CHARLES C. GARTIA. 

